We decided to go to Sainsburys for tonight's shopping trip because their tins of beans are cheaper than Tesco. This definitely turned out to be a case of 'Penny wise, pound foolish' because we ended up spending around £20, much of it on unnecessary stuff. We did save some money on things we needed (multibuy saving on tins of pulses, half price breakfast cereal, reduced price bread) but we managed to spend much more on frivolous things (Thorntons chocolate slab, santa shaped chocolate lollies and other heavily discounted Christmas stuff).
We also noticed Easter Eggs and Christmas chocolates on the same shelf. They might have only been 'creme eggs' but it's still a bit too early!